Hi!
Since my app relies exclusively on Apple ID sign-in—which should certainly be in line with Apple's preferences—and does not allow email registration, I set up a test account for Apple for the external testing phase, accessible via the app's entry page. With the transition to the App Store, I can no longer maintain this test access, as regular users could then also click this link, which would undoubtedly cause confusing and unwanted complications.
Therefore, my question is: what is the best way to continue making this test access available to Apple?"